The disclosure provides a tensile testing machine and includes: a processing filter that removes a noise component included in a test force measurement signal output from a load cell; and an adjustment unit that adjusts a frequency characteristic of the processing filter. The adjustment unit receives a detection signal output from the sensor, and adjusts the frequency characteristic of the processing filter on a basis of a difference between output signals of two low-pass filters having different frequency characteristics.

A method of controlling a mechanical testing instrument includes estimating a young's modulus, and applying force during a first time interval then comparing distance measured to expected distance; predicting a distance based on a first slope applying displacement distance and recalculating the slope; providing a corrected force applied for the proper displacement based on measured modulus and correction factor and adjusting into time and distance coherence; applying a force versus time regime interval and predict deformation at the end of the second interval measuring true deformation distance after the next interval; calculating the true slope based on the extrapolated actual slope; calculating a slope to apply for desired distance; and repeating measurement and correction steps, using the actual slope as the prediction basis. A system for carrying out the method is also disclosed using a data acquisition board.

The invention discloses a method for in vitro testing of specimens, such as biomaterials, to obtain history-dependent, time-invariant functional materials properties using time-convolution and idempotent analysis. The purpose of the method is to measure these properties using a data processing without limitations of materials models, the properties linearity or material homogeneity.

A dynamic mechanical analysis system provides an actuator that imparts expansion and contraction forces (e.g. shear force) to a viscoelastic material at high frequencies. Such high frequency analysis allows for the direct and accurate measurement of the characteristics of the material at high expansion/contraction frequencies directly, without the use of additional predictive analysis techniques, such as time-temperature superposition. The system also utilizes a clamping system, whereby two different sections of the viscoelastic material are held in place between by a pair of fixed clamps and a force member that is moved by the actuator. As such, the system is able to subject the viscoelastic material sample to simulated road conditions to identify various performance properties associated with the material sample.

An evaluation method of an impact test and an impact tester are provided, capable of simply and accurately obtaining a natural frequency of the impact tester without adding a special machine for measuring the natural frequency of the impact tester. A personal computer includes, as a functional configuration, a data extraction section extracting from time-series data of force a data section for obtaining a natural frequency of an impact tester in a natural vibration analysis, and an analysis section carrying out a frequency spectrum analysis on the extracted data section. The data extraction section and the analysis section are respectively stored as a data extraction program and an analysis program in a memory.

An evaluation method of an impact test and an impact tester are provided. A personal computer includes, as a functional configuration, a data extraction section extracting from time-series data of force a data section for obtaining a natural frequency of an impact tester in a natural vibration analysis, an analysis section carrying out a frequency spectrum analysis on the extracted data section, and a vibration waveform removal section removing a natural vibration waveform of the impact tester from force data. The data extraction section, the analysis section and the vibration waveform removal section are respectively stored as a data extraction program, an analysis program and a vibration waveform removal program in a memory.

An apparatus for testing paving samples includes a base that includes a paving sample tray about the cabinet and configured for translation relative to the cabinet. A roller is configured for imparting compressive forces to a sample carried by the sample tray. An arm is configured for moving the roller from a stowed position to an in-use position where the roller contacts the sample. A cylinder assembly having a piston therein supplies pressure forces to the arm to move the arm from the stowed position to the in-use position, wherein a depth of travel of the arm is limited by the sample. As the sample is compressed, the depth of travel increases. A measurement device is in communication with the cylinder for determining an amount of travel of the arm to thus determine an amount of compression of the sample.

A method includes exciting a work piece, measuring a dynamic response of the work piece with an optical imaging system and calculating a damping factor and a Q factor from said dynamic response. The method links two processes: an optical imaging system to output dynamic motion response data, and using the data to obtain a damping factor and a Q factor.

In a stress corrosion cracking evaluation method for a steam turbine, a sample having a high sensitivity is housed in a sample box of the steam turbine, and a sample breakage time is acquired. Then, based on the sample breakage time, a breakage time of the steam turbine is estimated.

The present invention provides a testing and characterization method for an initial fatigue damage and development process of vulcanized rubber, and falls within the technical field of rubber. The testing and characterization method comprises the following steps: preparing vulcanized rubber; preparing test samples; preparing fatigue testing specimens; and characterizing an initial fatigue damage and development process. The testing and characterization method provided by the present invention is simple, and closely associates a simple and easy-to-implement macro mechanical property test with changes of an internal microstructure, which are difficult to observe and analyze; and the method is high in efficiency and easy for operation and data collection, and data measured has good reference.